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pH and Micellar Effects on the Quenching of Tris(2,2′-bipyridine)Ruthenium(II) Luminescence by 1-Alkyl-4,4′ -bipyridinium : Evidence of Deep Embedment of the Quencher Cations in Sodium Dodecyl Sulfate Micelle

Title
pH and Micellar Effects on the Quenching of Tris(2,2′-bipyridine)Ruthenium(II) Luminescence by 1-Alkyl-4,4′ -bipyridinium : Evidence of Deep Embedment of the Quencher Cations in Sodium Dodecyl Sulfate Micelle
Authors
Park J.W.Kim Y.N.
Ewha Authors
박준우
SCOPUS Author ID
박준우scopusscopus
Issue Date
1997
Journal Title
Bulletin of the Korean Chemical Society
ISSN
0253-2964JCR Link
Citation
Bulletin of the Korean Chemical Society vol. 18, no. 2, pp. 185 - 189
Indexed
SCI; SCIE; SCOPUS; KCI scopus
Document Type
Article
Abstract
The effects of pH and sodium dodecyl sulfate (SDS) micelle on the quenching of Ru(bpy)32+ luminescnce by N-alkyl-4,4′-bipyridinium ions (RBPY+ : R=methyl, octyl, dodecyl, benzyl) were investigated. In the absence of SDS, the quenching rate at pH 2 is similar to that of the corresponding methylalkyl viologens and much greater than that in pH 8 solution due to greater reducibility of the protonated form of RBPY+ (HRBPY2+). The quenching rate at pH 2 is strongly enhanced by the presence of SDS, while that at basic pH is greatly retarded. These observations are explained by deep embedment of RBPY+ into the hydrophobic hydrocarbon region of the micelle, whereas Ru(bpy)32+ and HRBPY2+ locate in the Stern layer of the micelle.
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자연과학대학 > 화학·나노과학전공 > Journal papers
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